
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1 {
    text-align: center;
    color: #333;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #555;
}

textarea {
    width: 100%;
    height: 250px; /* 增加了高度以适应更多文本 */
    padding: 15px;
    font-size: 16px;
    line-height: 1.5;
    color: #333;
    background-color: #f9f9f9;
    border: 2px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

textarea:focus {
    border-color: #888;
    background-color: #fff;
    outline: none; /* 移除浏览器默认的聚焦轮廓 */
}

input[type="submit"] {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 20px;
    font-size: 16px;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #0056b3;
}
